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4 Vesta
Classification: Main-belt Asteroid          SPK-ID: 2000004
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08874017002173754 1.0284e-08  
a 2.361793227026224 1.2194e-09 AU
q 2.152207294503728 2.388e-08 AU
i 7.140427316529066 1.4093e-06 deg
node 103.8513672233257 2.7662e-06 deg
peri 151.1985275178533 7.5857e-06 deg
M 20.86384148999364 5.5256e-06 deg
tp 2456923.666076666135
(2014-Sep-23.16607667)
2.038e-05 JED
period 1325.748779938602
3.63
1.0267e-06
2.811e-09
d
yr
n .2715446587223504 2.103e-10 deg/d
Q 2.571379159548719 1.3276e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      7107  
   data-arc span      67680 days (185.30 yr)  
   first obs. used      1827-12-11  
   last obs. used      2013-03-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55596  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2013-Jul-16 08:46:23  

Additional Information
 Earth MOID = 1.14151 AU 
 T_jup = 3.535 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 3.20 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
magnitude slope G 0.32   n/a PDS3 (MPC 17257) Fit
diameter diameter 530 km n/a Thomas et al. (1997) Yeomans E-mail 2001-Apr-04
GM GM 17.8 km^3/s^2 n/a JPL IOM 312.F01-006  
rotation period rot_per 5.342 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Giclas, H.L. (1951) Lowell Obs. Rep. No. 9, 33-71.]
[Stephenson, C.B. (1951) Astrophys. J. 114, 500-504.]
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 200-220.]
[Cailliate, C. (1956) Publ. Observ. Lyon 3, fasc. 28.]
[Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.]
[Gehrels, T. (1967) Astron. J. 72, 929-938.]
[Taylor, R.C.; Tapia, S.; Tedesco, E.F. (1985) Icarus 62, 298-304.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Aksenov, A.N.; Egorov, Yu.A.; Teifel, V.G.; Kharitonova, G.A. (1987) Pis'ma Astron. Zh. 13, 616-620; Sov. Astron. Lett. 13, 257-259.]
[Lagerkvist, C.-I.; Williams, I.P. (1987) Astron. Astrophys. Suppl. Ser. 68, 295-315.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.]
[Reynoldson, G.; Thacker, P.; Erikson, A.; Oja, T. (1993) Minor Planet Bul. 20, 11-13.]
[Fornasier, S.; Mottola, S.; Barucci, M.A.; Sierks, H.; Hviid, S. (2011) Astron. Astrophys. 533, L9.]
[Russell, C. T.; Raymond, C. A.; Coradini, A.; McSween, H. Y.; et al. (2012) Science 336, 684-686.]
geometric albedo albedo 0.4228   0.053 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
B-V BV .782 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=23; phase (min.=1.73, mean=14.92, max.=24.69) deg.
U-B UB .492 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=23; phase (min.=1.73, mean=15.34, max.=24.69) deg.
Tholen spectral type spec_T V   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B V   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4 Vesta          Discovered 1807-Mar-29 by Olbers, H. W. at Bremen
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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